NMS520-MIB :: nms520HdlcInvert

MIB Reference — IPNetwork Monitor · Updated October 06, 2026

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nms520HdlcInvert

Module: NMS520-MIB

OID (symbolic): NMS520-MIB::nms520HdlcInvert

OID (numeric): 1.3.6.1.4.1.498.8.2.2.1.15

Node type: OBJECT-TYPE

Type: INTEGER

Access: read-write

Description: Primary data invert option. Will enhance the quality of data when network does not provide B8Z5. Primarily used with DDS II 56k

What is nms520HdlcInvert?

Toggles primary data inversion (normal vs. invert), used to improve link quality on DDS II 56k circuits when the network doesn't provide B8ZS.

Examples

Walk all instances (SNMPv2c):

snmpwalk -v2c -c public <target> 1.3.6.1.4.1.498.8.2.2.1.15
snmpwalk -v2c -c public <target> NMS520-MIB::nms520HdlcInvert

Get a specific instance (index 1):

snmpget -v2c -c public <target> 1.3.6.1.4.1.498.8.2.2.1.15.1
snmpget -v2c -c public <target> NMS520-MIB::nms520HdlcInvert.1

Set instance 1 (SNMPv2c):

snmpset -v2c -c private <target> 1.3.6.1.4.1.498.8.2.2.1.15.1 i <value>

Start monitoring General DataComm (GDC) NMS520 DDS DSU/CSU unit with a free 30-day trial of IPNetwork Monitor. Create custom SNMP monitor using the NMS520-MIB::nms520HdlcInvert OID value, configure state conditions and alerts, and monitor any General DataComm (GDC) NMS520 DDS DSU/CSU unit from a single console.

OID Breakdown

Upper-level ancestors (8 from the standard OID tree / other modules)
Numeric OIDNameModule
1isoLANART-AGENT
1.3orgAirPair-MIB
1.3.6dodAirPair-MIB
1.3.6.1internetAirPair-MIB
1.3.6.1.4privateAirPair-MIB
1.3.6.1.4.1enterprisesAirPair-MIB
1.3.6.1.4.1.498gdcDMA200-MIB
1.3.6.1.4.1.498.8dsuDDS-MIB
Numeric OIDNameModule
1.3.6.1.4.1.498.8.2nms520NMS520-MIB
1.3.6.1.4.1.498.8.2.2nms520UnitCfgTableNMS520-MIB
1.3.6.1.4.1.498.8.2.2.1nms520UnitCfgEntryNMS520-MIB
1.3.6.1.4.1.498.8.2.2.1.15nms520HdlcInvertNMS520-MIB